Centrifugal machine



(No Model.) 2 Sheets-Sheet 1.

H. W. LAPPERTY.

CENTRIFUGAL MACHINE.

No. 449,327. Patented Mar. 31,1891.

WITNESSES INVENTOR 2 Sheets Sheet 2.

(No Model.)

H. W. LAFPERTY. GENTRIPUGAL MACHINE.

WITNESSES WM ms NORRIS vzrsns co, monru'mu, WASHINGTON, n, c.

UNITED STATES PATENT OFFICE.

HUGH IV. LAFFERTY, OF I'VILMINGTON, DELAWARE.

CENTRIFUGAL MACHINE.

SPECIFICATION forming part of Letters Patent No. 449,327, dated March 31, 1891.

Application filed June 20, 1890. Serial No. 356,066. (No model.)

To all whom it may concern/.-

Be it known that 1, HUGE W. LAFFERTY, of \Vilmington, in the county of New Castle and State of Delaware, have invented a certain new and useful Improvement in Centrifugal Machines, of which improvement the following is. a specification.

My present invention relates to and is an improvement upon centrifugal machines of the class set forth in Letters Patent of the United States No. 422,083, granted and issued to me under date of February 25, 1890.

The object of my invention is to provide improved means for varying the speed of the receiving-vessel as from time to time desired, as well as to promote the separation of the mingled solid and liquid ingredients of the charge by the action of currents of air thereon.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a vertical central section through a centrifugal machine embodying my invention, and Fig. 2 a similar section, on an enlarged scale, through the receiving-vessel and separating-basket, detached.

In the practice of myinvention I providea centrifugal machine which accords, substantially, in its general and leading features of construction with that of my Patent No. 422,083, above referred to, and which will not, therefore, except as to the improvement which constitutes my present invention, be fully and at length described herein. In my aforesaid patent the pulley 14 of the spindle 10, which carries the outer or separating basket 8, and the pulley 21 of the sleeve 16, to which the inner or receiving vessel 24: is secured, were rotated by separate and independent belts, and in order to effectvariation of speed of the receiving-vessel it was necessary to shift its driving-belt from one to another face of its pulley and to employ a proper belttightener. Under my present construction I employ a single driving-belt 15, which passes around and receives movement from a driv ing-pulley 15, secured upon a counter-shaft 15", which is journaled in the vertical frame or standard 13 of the machine. From the driving-pulley 15 the belt 15 passes around the pulley 14 of the spindle of the separating-basket, thence around an idle-pulley 2S, thence around the cone-pulley 21 of the sleeve 16 of the receiving-vessel 24C, and thence back to the driving-pulley. The idle-pulley 28 is mounted in a bearing on one end of an arm 29, the opposite end of which is journaled on a pin 30 in the standard 13. The arm 29 is adapted to be moved about the axis of its pivot 30, so as to correspondingly raise and lower the idle-pulley 28 by a screwed stem 31 engaging a nut 32 on the standard and coupled to the arm 29, the upper and lower sections of the stem being properly connected to admi of the rotation of the lower section in the nut without imparting other than longitudinal movement to the upper section. It will be seen that upward movement of the arm 29 and the idle-pulley 28, carried thereon, will transfer the belt from a larger to a smaller diameter of the cone-pulley 21, and thereby correspondingly increase the speed of the sleeve 16 and attached receiving-vessel 24. The movement of the idle-pulley being in an arc concentric with the pivot will maintain the normal tension of the belt 15 as it passes to the smaller diameter of the pulley 21 and obviate the necessity of employing a special belt-tightener. The varia tion of speed of the receiving=vessel, which is effected, as above described, during the operation of the machine, admits of a more rapid or slower discharge of the material treated as may from time to time become necessary or desirable.

In order to further facilitate the separation of the solid and liquid constituents of the charge, the receiving-vessel 24, instead of bein g of imperforate periphery, as in Patent No. 422,083, is under my present invention provided throughout with a series of small openings or perforations 27, in order to admit of the passage of numerous currents of air when in rapid rotation, the action of said currents upon the material supplied to the vessel tending to assist that of the centrifugal force due to its rotation in separating and discharging the liquid constituents.

The receiving-vessel 2 1is preferably provided with a series of teeth or isolated proj cctions 26, as in Patent No. 422,083, and the operation of the machine b'eingsimilai' to that of said patent need not be herein described.

I claim as my invention and desire to secure by Letters Patent 1. In a centrifugal machine, the combination of an outer casing, a conical separating drum or basket and a conical receiving-vessel secured concentrically upon independent shafts within the casing, a cone-pulley fixed upon the shaft of the receiving-vessel, a pulley fixed upon the shaft of the separating-v basket, an idle-pulley rotating in an armpivoted to a fixed standard, and a driving-belt passing around said idle-pulley and around the pulleys of the shafts of the receivingwes 'sel separatingbasket, s'i'ibstan'tially as set forth.

2.1n acentrifugal machine of the class herein described, the combination offan arm pivoted to a fixed standard, an idle-pulley journaled in the free end of said arm, an adjusting-steln coupled to said arm, and a drivingbelt passing around the idle pulley and around a cone-pulley and a'plain pulley fixed, respectively, on the two shafts of the machine, these members being combined for joint operation in efifecting coincident Variation of speed of one of the driven shafts and maintenance of normal tension'o'f the drivingbelt, substantially as set forth.

HUGH XV. LAFFERTY. \Vitncssesz ISA C DILLIN-, Joan J. shim. 

